apt-pkg/srcrecords.cc

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: srcrecords.cc,v 1.7.2.2 2003/12/26 16:27:34 mdz Exp $
   4 /* ######################################################################
   5
   6    Source Package Records - Allows access to source package records
   7
   8    Parses and allows access to the list of source records and searching by
   9    source name on that list.
  10
  11    ##################################################################### */
  12                                                                         /*}}}*/
  13 // Include Files                                                        /*{{{*/
  14 #include<config.h>
  15
  16 #include <apt-pkg/srcrecords.h>
  17 #include <apt-pkg/error.h>
  18 #include <apt-pkg/sourcelist.h>
  19 #include <apt-pkg/strutl.h>
  20 #include <apt-pkg/metaindex.h>
  21
  22 #include <apti18n.h>
  23                                                                         /*}}}*/
  24
  25 // SrcRecords::pkgSrcRecords - Constructor                              /*{{{*/
  26 // ---------------------------------------------------------------------
  27 /* Open all the source index files */
  28 pkgSrcRecords::pkgSrcRecords(pkgSourceList &List) : d(NULL), Files(0), Current(0)
  29 {
  30    for (pkgSourceList::const_iterator I = List.begin(); I != List.end(); ++I)
  31    {
  32       std::vector<pkgIndexFile *> *Indexes = (*I)->GetIndexFiles();
  33       for (std::vector<pkgIndexFile *>::const_iterator J = Indexes->begin();
  34            J != Indexes->end(); ++J)
  35       {
  36          Parser* P = (*J)->CreateSrcParser();
  37          if (_error->PendingError() == true)
  38             return;
  39          if (P != 0)
  40             Files.push_back(P);
  41       }
  42    }
  43
  44    // Doesn't work without any source index files
  45    if (Files.empty() == true)
  46    {
  47       _error->Error(_("You must put some 'source' URIs"
  48                     " in your sources.list"));
  49       return;
  50    }
  51
  52    Restart();
  53 }
  54                                                                         /*}}}*/
  55 // SrcRecords::~pkgSrcRecords - Destructor                              /*{{{*/
  56 // ---------------------------------------------------------------------
  57 /* */
  58 pkgSrcRecords::~pkgSrcRecords()
  59 {
  60    // Blow away all the parser objects
  61    for(std::vector<Parser*>::iterator I = Files.begin(); I != Files.end(); ++I)
  62       delete *I;
  63 }
  64                                                                         /*}}}*/
  65 // SrcRecords::Restart - Restart the search                             /*{{{*/
  66 // ---------------------------------------------------------------------
  67 /* Return all of the parsers to their starting position */
  68 bool pkgSrcRecords::Restart()
  69 {
  70    Current = Files.begin();
  71    for (std::vector<Parser*>::iterator I = Files.begin();
  72         I != Files.end(); ++I)
  73       if ((*I)->Offset() != 0)
  74          (*I)->Restart();
  75
  76    return true;
  77 }
  78                                                                         /*}}}*/
  79 // SrcRecords::Find - Find the first source package with the given name /*{{{*/
  80 // ---------------------------------------------------------------------
  81 /* This searches on both source package names and output binary names and
  82    returns the first found. A 'cursor' like system is used to allow this
  83    function to be called multiple times to get successive entries */
  84 pkgSrcRecords::Parser *pkgSrcRecords::Find(const char *Package,bool const &SrcOnly)
  85 {
  86    if (Current == Files.end())
  87       return 0;
  88
  89    while (true)
  90    {
  91       // Step to the next record, possibly switching files
  92       while ((*Current)->Step() == false)
  93       {
  94          if (_error->PendingError() == true)
  95             return 0;
  96          ++Current;
  97          if (Current == Files.end())
  98             return 0;
  99       }
 100
 101       // IO error somehow
 102       if (_error->PendingError() == true)
 103          return 0;
 104
 105       // Source name hit
 106       if ((*Current)->Package() == Package)
 107          return *Current;
 108
 109       if (SrcOnly == true)
 110          continue;
 111
 112       // Check for a binary hit
 113       const char **I = (*Current)->Binaries();
 114       for (; I != 0 && *I != 0; ++I)
 115          if (strcmp(Package,*I) == 0)
 116             return *Current;
 117    }
 118 }
 119                                                                         /*}}}*/
 120 // Parser::BuildDepType - Convert a build dep to a string               /*{{{*/
 121 // ---------------------------------------------------------------------
 122 /* */
 123 const char *pkgSrcRecords::Parser::BuildDepType(unsigned char const &Type)
 124 {
 125    const char *fields[] = {"Build-Depends",
 126                            "Build-Depends-Indep",
 127                            "Build-Conflicts",
 128                            "Build-Conflicts-Indep"};
 129    if (unlikely(Type >= sizeof(fields)/sizeof(fields[0])))
 130       return "";
 131    return fields[Type];
 132 }
 133                                                                         /*}}}*/
 134
 135